import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("Flutter Demo", style: TextStyle(color: Colors.white)),
          backgroundColor: Colors.blue,
        ),
        body: HomePage(),
      ),
    );
  }
}

class HomePage extends StatelessWidget {
  const HomePage({super.key});

  @override
  Widget build(BuildContext context) {
    // 获取屏幕的宽高
    // final size = MediaQuery.of(context).size;
    return Column(
      children: [
        SizedBox(
          width: double.infinity,
          height: 40,
          child: Stack(
            children: [
              Align(alignment: Alignment.topLeft, child: Text("收藏")),
              Align(alignment: Alignment.topRight, child: Text("购买")),
            ],
          ),
        ),
        SizedBox(
          width: double.infinity,
          height: 40,
          child: Stack(
            children: [
              Positioned(left: 10, child: Text("收藏")),
              Positioned(right: 10, child: Text("购买")),
            ],
          ),
        ),
      ],
    );
  }
}
